diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index cfeadd5f61f1..747e1cbb7ec9 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -2747,6 +2747,24 @@ static void zbc_open_zone(struct sdebug_dev_info *devip,
 	}
 }
 
+static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
+				     struct sdeb_zone_state *zsp)
+{
+	switch (zsp->z_cond) {
+	case ZC2_IMPLICIT_OPEN:
+		devip->nr_imp_open--;
+		break;
+	case ZC3_EXPLICIT_OPEN:
+		devip->nr_exp_open--;
+		break;
+	default:
+		WARN_ONCE(true, "Invalid zone %llu condition %x\n",
+			  zsp->z_start, zsp->z_cond);
+		break;
+	}
+	zsp->z_cond = ZC5_FULL;
+}
+
 static void zbc_inc_wp(struct sdebug_dev_info *devip,
 		       unsigned long long lba, unsigned int num)
 {
@@ -2759,7 +2777,7 @@ static void zbc_inc_wp(struct sdebug_dev_info *devip,
 	if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
 		zsp->z_wp += num;
 		if (zsp->z_wp >= zend)
-			zsp->z_cond = ZC5_FULL;
+			zbc_set_zone_full(devip, zsp);
 		return;
 	}
 
@@ -2778,7 +2796,7 @@ static void zbc_inc_wp(struct sdebug_dev_info *devip,
 			n = num;
 		}
 		if (zsp->z_wp >= zend)
-			zsp->z_cond = ZC5_FULL;
+			zbc_set_zone_full(devip, zsp);
 
 		num -= n;
 		lba += n;